TOC分析仪在化学有机污染物中的监测与应用

Application of Total Organic Carbon Analyzer in Organic Pollutants Monitoring

将等分的环境水样分别注射到总有机碳分析仪中的TC和IC反应管内,在高温炉900℃和低温炉150℃的工作条件下使其充分氧化为CO_2和H_2O后,将生成的CO_2分别导入非分散红外检测器中,测定出总碳TC和无机碳IC的浓度。依据TC和IC的计量值,获得TOD的测定量。该法与COD_(Cr)的测定环境水样结果比较,TOC准确度实验结果为0．87%～0．94%的相对误差,完全满足国标样品标准,精密度实验中TOC的标准偏差小于0．25,而COD标准偏差为0．53～0．55,准确度与精密度都令人满意。能适合于环境水样中有机污染物的快速监测。

Isometric water samples were injected separately into total organic carbon analyzer TC and the IC reaction tubes. Under the working condition of the tower electric muffle furnace 900℃ and lower temperature 150℃, they were fully oxidized to carbon dioxide and hydrogen dioxide which would be inducted separately into the non-disperser and the infrared detector, and total carbon TC and the inorganic carbon IC density would be monitored, then based on TC and IC value, the TOD would he determined. Compared with determination of environment water sample result, the TOC accuracy experiment indicated the relative error is 0.87% - 0.94%, satisfies the GB code sample standard in the accuracy experiment. The TOC standard deviation is under 0.25, which is smaller than the COD standard deviation 0.53 - 0.55, this measuring method has high accuracy and precision and the results are satisfying. And this method meets the requirement of the organic matters＇fast monitoring of organic water sample.